Specifies the display screen on which the Xv Server
is to accept requests from Xv clients. If the display option is not specified,
Xv uses the display screen specified by your DISPLAY environment variable.
The display option has the format hostname:number. Using two colons (::)
instead of one (:) indicates that DECnet is to be used for transport.
port
Specifies
the port to be released. If the port had not been previously grabbed, the
request is ignored.